Fahad
In memoriam
Posts: 459 
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WTT 67
Apr 30, 2013 16:26:43 GMT
Post by Fahad on Apr 30, 2013 16:26:43 GMT
How much time does this save over the platform staff closing the doors with the porter buttons?
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Deleted
Deleted Member
Posts: 0
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WTT 67
Jul 5, 2013 19:34:15 GMT
Post by Deleted on Jul 5, 2013 19:34:15 GMT
WTT 67 (and WTT 6 for the W&C) will be introduced on 15th September
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Post by superteacher on Jul 29, 2013 11:07:27 GMT
Any chance of a breakdown of changes in WTT 67? Are they similar to what has already been mentioned? Are they going to improve the peak service to Epping I.e. have fewer 8 minute gaps.
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WTT 67
Aug 14, 2013 9:54:43 GMT
Post by superteacher on Aug 14, 2013 9:54:43 GMT
In answer to my own question, yes! The peak Epping service has been considerably improved. Now, only every 3rd or 4th train terminates short at Debden or Loughton, which now better matches the increased demand for Epping.
in the am westbound peak, there is a 30 min period where trains run every 1.75 mins, equivalent to 34 tph frequency.
in the evening peak, there is now a train which runs to Grange Hill via Woodford before stabling in Hainault depot. Interestingly, this is at the height of the peak, leaving Liverpool Street at about 17:20.
Another interesting thing is that during the peaks, most westbound trains leaving from platform 1 at Leytonstone no longer run via the loop, but crossover to the main westbound line immediately after departing the station.
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towerman
My status is now now widower
Posts: 2,970
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WTT 67
Aug 16, 2013 14:50:42 GMT
Post by towerman on Aug 16, 2013 14:50:42 GMT
I've noticed that since the upgrade trains from Epping & Hainault branches usually use separate WB platforms at Leytonstone whereas when Leytonstone signal box was in operation the outside WB platform was only used during the peaks.Any reason for this change?
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Deleted
Deleted Member
Posts: 0
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WTT 67
Aug 16, 2013 23:07:47 GMT
Post by Deleted on Aug 16, 2013 23:07:47 GMT
Isn't there already a 30tph service peak hours on the Central? (e.g. there are 30 westbound trains in the central section between 0812 and 0911) - what criteria need to be met to meet a '30tph peak'?
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WTT 67
Aug 16, 2013 23:33:27 GMT
Post by superteacher on Aug 16, 2013 23:33:27 GMT
I've noticed that since the upgrade trains from Epping & Hainault branches usually use separate WB platforms at Leytonstone whereas when Leytonstone signal box was in operation the outside WB platform was only used during the peaks.Any reason for this change? I think it's mainly down to the off peak frequencies being much greater than they were back then. In the early 90's the off peak frequency at Leytonstone was 12tph, 6 from Hainault branch and 6 from Epping. Now it's 24tph, and will even be 27tph on Saturdays between 12pm and 6pm! |
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WTT 67
Aug 16, 2013 23:36:41 GMT
Post by superteacher on Aug 16, 2013 23:36:41 GMT
Isn't there already a 30tph service peak hours on the Central? (e.g. there are 30 westbound trains in the central section between 0812 and 0911) - what criteria need to be met to meet a '30tph peak'? Yes, this is true. I suppose a proper 30tpn service would have this in both directions. This was the case on the Central a few years ago and despite the upgrade which has seen a dramatic improvement in off peak frequencies, they've never managed to get it back to 30tph in both directions, and in both peaks. |
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WTT 67
Aug 17, 2013 10:21:30 GMT
Post by d7666 on Aug 17, 2013 10:21:30 GMT
There is a sort of "lies, damned lies, and statisitics" thing going on here.
The media was putting out last week 34 TPH on the Central.
WTT67 has a 32 minute burst of 105 second headways, which is a rate of 34.3 TPH, or 34 TPH in round figures. But this is not sustained for an hour. Even the 30/29 TPH in WTT66 is not sustained for long periods.
Another is the statistic that WTT66 has 77 trains in service at peak times and WTT67 79.
Well yes WTT66 does have 77 trains simultaneously, but only for very very brief periods. I'll need to look it up, but it goes something the 77th train enters service in the a.m. only about 12 minutes before one other finishes in sidings, likewise in the evening but its a bit longer, I think it is 18 minutes, I'll need to look these things up.
I will also have to look for this - each day is divided into time bands like peak, off peak, inter peak, late evening etc. I can't remember the times off the top off my head, but this defined peak is actually quite long, it is something like 3 hours. If this 3 h were used and TPH averaged across that interval it would be nothing like even 30 TPH.
So not exactly answering your question, but agreeing what define peak TPH needs to be clearly understood.
--
Nick
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WTT 67
Aug 17, 2013 10:50:31 GMT
Post by superteacher on Aug 17, 2013 10:50:31 GMT
30 tph operates for 2 hours eastbound in the evening peak in WTT 67.
The 79 trains in service are from 08:41 to 09:10 and 17:35 to 17:54
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North End
Beneath Newington Causeway
Posts: 1,769
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WTT 67
Aug 17, 2013 17:16:40 GMT
Post by North End on Aug 17, 2013 17:16:40 GMT
30 tph operates for 2 hours eastbound in the evening peak in WTT 67. The 79 trains in service are from 08:41 to 09:10 and 17:35 to 17:54 Anyone know if there are any plans to reinstate 100kph running? I've seen documentation which states the plan is to reinstate the full speed and also reinstate the tunnel brake rates back to their designed rate, but more recent documentation doesn't seem to mention either of these. It would be great to see the 92 stock back performing at their capability. |
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Deleted
Deleted Member
Posts: 0
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WTT 67
Aug 17, 2013 22:04:31 GMT
Post by Deleted on Aug 17, 2013 22:04:31 GMT
Thanks d7666 that's helpful. It hadn't occurred to me that the situation might be different in the other direction, but the matter is far from clear!
North End: I thought the reason the 85km/h limit was imposed was due to the rolling stock, not the track? Even then, the limit seems to be about 70km/h in tunnels - can anyone confirm this? It does seem there are sections when a higher line speed would be possible in tunnel sections, even within the scope of the 85km/h limit.
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WTT 67
Aug 18, 2013 9:31:25 GMT
Post by superteacher on Aug 18, 2013 9:31:25 GMT
Apparently Mile End to Stratford was supposed to have a higher limit, but the track condition precluded this from happening, even though the 1962 stock used to hammer along this section at 50 mph plus!
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towerman
My status is now now widower
Posts: 2,970
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WTT 67
Aug 23, 2013 14:46:00 GMT
Post by towerman on Aug 23, 2013 14:46:00 GMT
Even back in the days of WTT 55 there was only about 20mins in the AM when the full service was in operation.The last train left Hainault Depot at 08:42 & the first stabler in Ruislip(via Ruislip Gdns) was just after 9:00
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WTT 67
Oct 10, 2013 18:56:53 GMT
Post by plasmid on Oct 10, 2013 18:56:53 GMT
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WTT 67
Oct 10, 2013 22:33:59 GMT
Post by Dstock7080 on Oct 10, 2013 22:33:59 GMT
This only operates for a very short time on the westbound AM peak, when trains run at 1¾-min intervals for 30mins (not a whole hour!) for the rest of this hour they operate at 2-2¼-min intervals, so 32tph. This earlier post gives the details: link |
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WTT 67
Oct 13, 2013 20:11:35 GMT
Post by plasmid on Oct 13, 2013 20:11:35 GMT
This only operates for a very short time on the westbound AM peak, when trains run at 1¾-min intervals for 30mins (not a whole hour!) for the rest of this hour they operate at 2-2¼-min intervals, so 32tph. This earlier post gives the details: linkMakes sense. Cheers pal. |
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